After taking the emergency contraceptive pill has not been bleeding, may be endocrine disorders, contraceptive failure and other reasons. Emergency contraceptive pills belong to the hormone drugs, after taking the hormone levels may be disturbed in the body, to the body of endocrine disorders after disrupting the normal menstrual cycle, may be after taking the drug has not been bleeding phenomenon, go to the hospital for examination under the guidance of the doctor to use estradiol valerate tablets, progesterone and other medications for cyclic treatment. Failure of contraception after taking emergency contraceptive pills, women with unwanted pregnancy will lead to menstruation, observe the phenomenon that there has been no bleeding, through the urine pregnancy test, blood HCG test pregnancy test, a more accurate understanding of whether the woman is pregnant. There are many reasons why there is no bleeding after taking emergency contraceptive pills, and you should go to the hospital to find out through examination.